Furnace.



L. L. KNOX.

FURNACE.

A=PPLIOATION FILED JUNE 30,1908.

Patented Apr. 20, 1909.

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qhhlllrteullk INVENTOR WITNESSES L. L. KNOX.

FURNAGB.

APPLICATION FILED-JUNE 30,1908.

Patented Apr. 20, 1909.

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Patented Apr. 20, 1909.

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APPLICATION FILED JUNE 30,1908

L. L. KNOX.

WITN ESSES L. L. KNOX.

FURNACE.

APPLICATION FILED JUNE 30, 1908.

Patented Apr. 20, 1909.

WITNESSES INVENTOIT UNITED STATES PATENT OFFICE.

LUTHER L. KNOX, OF BEN AVON, PENNSYLVANIA, ASSIGN-OR lO KEYSIONE FURNACE CONSTRUCTION COMPANY, OF PITTSBURG, PENNSYLVANIA, A CORPORATION OF PENN- SYLVANIA.

FURNACE.

To all whom it concem;

Be it known that I, LUTHER L. Knox, of

Ben Avon, Allegheny county, Pennsylvania,

- have invented a new and useful Improveforming part of this spec nace and with the necks which connect the regenerators with the slag pockets in section; Fig. 2 is a longitudinal vertical section of'the same, looking toward the tapping side of the furnace; Fi 3 is a transverse section on the line IIII of Fig. 2; Fig. 4 is an end view of one-half of the furnace; Fig. 5 is a horizontal section taken through one of the uptakes and the adjacent portions of the furnace.

My invention has relation to improvements in furnaoes'and is applicable to various kinds of furnaces, such as open hearth furnaces, melting furnaces, heating furnaces, etc, and is designed to provide means for protecting the furnace walls or such portions thereof as may be necessary from the more or less rapid destruction which ordinarily takes place in furnaces of this class.

To this end, my invention consists in the provision of means for water-cooling those portions of the furnace which are inostsub- -ject to the destructive action, such as the side walls,.the end walls, the roof, ports, and the uptakes.

The precise nature of my invention will be best understood by reference to the accompanying drawings, in which I have illustrated its embodiment in an openhearth furnace, it being premised, however, that the details of construction and arrangement of the cooling means may be variously changed by those skilled in, the art, without departing from the spirit and scope of my invention, and that the invention is equally applicable to those types of furnaces in the above stated.

In the drawings, the numeral 2 designates the side walls of an open-hearth furnace, one of such walls being provided with the usual charging doors 3, and mending door 4, and

the other side wall having the usu a1 tap open- 6 desi nates the 'heartlrof the furnace and 7 the arc ed roof.

Specification of Letters Patent;

Application filed. rune 30, 1908. Serial No. 441,177.

general class Patented April 20, 1909.

8 is the gas port at one end of the furnaoe and leading into the furnace chamber from the gas uptake 9.

10 designates one of the air uptakes and 11 and 12 are the slag pockets from which the uptakes 9 and '10 lea 13 desi nates the air port leading into the furnace-c amber from the air chamber at p the upper end of the air uptakes.

In accordance with my invention, I build into the side walls of the furnace the longitudinally extending water-cooled boxes or castings 14-, which, at the tapping side of the furnace, may extend continuously the entire length of the furnace, as shown in dotted lines in Fig. 2, these boxes or castings being I arranged one above another and preferably each of the thickness of one or more bricks, so that they may be built intothe furnace walls without cutting or breaking bricks. Similar boxes or castings 15 are built into the side walls of the air ports 13. These boxes or castings are builtinto thewall as a permanent part thereof and they are not removable. At the charging side of the furnace, these cooling boxes or castings with the exception ofthe upper one are in shorter lengths or sections and are built into the side wall intermediate of the charging doors, as shown in, Fig. 1. If preferred, the cooling boxes or castings on the tapping side of the furnace might also be made in similar short sections, the length and form of these castings in any case being such as maybe most-convenient for the particular job in hand.

' The roof 7 of the furnace is protected by a series of water-cooled boxes or castings 16, which are removably set into the outer surface of the roof as clearly shown in Figs. 2' and 3. Each of'these boxes or castings 16 is preferably made in two sections adjoining or abutting each. other at the central highest portion of the roof and extending therefrom over the ports, as shown in Figs. 1 and 2.

The back wall of the uptakes is roteoted -by a series of boxes or castings 17, uilt into the side walland the side walls and partitions of the uptakes are also protected by the coolin boxes 18, one or more of these boxes, as

in icated at 18, being extended inwardly to rotect the walls of the ports. One or more oxes 19 also extend inwardly from the sides,

of the furnace to protect the front wall of the air uptake 10, from the cutting action of the outgoing ga'ses.

transversely the entire width of the ports for the purpose of protecting the bottom wall of water-cooled box or casting 23. This box or casting has continuous side walls 23 which carry skewbacks 24, which support-the bricks or other refractory material 25, and which are connected by the water-clrculatiug1 portions 26 between which the brick or ot or refractory material extends, said casting also sup orting an uppenrefractory coverm which orms the floor of the air port 13. The inner portion 22 of the arch between the air and gas ports is .1 ovided with a plurality of separate arched water-cooled boxes or castings 27, extending transversely thereof and w rich, at their outer ends, at the charging side of the furnace, are rovided with'the flanges 28, by means of w 'ch they can be readil enga ed by a charging machine and pulle out o? the arch. Each of these castings has skewbacks 29, as shown in Fig. 3,

for supporting the refractory material of the arch in which the boxes are embedded, this refractory material consisting of bricks and built up in sections, as shown in Fig. 2. The purpose of this sectional construction is not to permit of the removal and replacement of the individual water-cooled castings, but to facilitate the removal and rebuilding of the arch, in caseit becomes burned out.

The various water-cooled boxes or castings which protect the different parts'of the furnace may be provided with any suitable arrangement of connections for circulating Water therethrough. 37, wherever seen, designates circulating connections for this pur pose.

necessarily depend in each case upon the character of the furnace, its size, etc., and

they may vary, therefore, in each case, 'ac cording to the circumstances. My invention provides for the water-cooling of all portions of the furnace walls and other parts which are ordinarily most subject to the destructive action of the heat, by simple and eiiective means, since the water-cooled boxes or castings can be readily built into the fur-, nace durlng its constructionfiandlaslthese.

A similar box 20, of whichv one or more may be employed, also extends It will be understood that the precise arrangement and form of the cooling boxes will eiaise boxes or castings are of a thickness equal to one or more bricks, no cutting or fitting of the bricks thereto is re uired. The water circulation provided by t iese boxes or castings effectively cools the brickwork to such an extent as to check the cutting action or the cutting away of the walls, while at the same time thisaction is not carried to a sufiicient extent to cool down the gases.

I claim:

LA furnace of the class described having its side wall provided with a plurality of water-cooled: boxes or castings built into the wall as a permanent part thereof and separated from each other by intervening portions of the wall, substantially as described.

2. A furnace of the class described having its side wall provided with a plurality of watencooled boxes or castings built into the wall as a permanent part thereof, said boxes or castings being arranged one above an- 4. A furnace of the class described having its'side wall at the charging side provided with a plurality of longitudinally extending water-cooled boxes or castings permanently built therein intermediate the charging doors, said boxes or castin being arranged in substantially parallel lines, separated from each other by intervening portions of the wall, substantially as described.

5. A furnace of the class described having its side wall at the charging side provided with a plurality of longitudinally extending water-cooled boxes or castings permanently built therein intermediate the charging doors and also above said doors, said boxes or cast ings being arranged in substantially parallel lines, separated from each other by intervening portions of the wall, substantially as described.

6. A furnace of the class described having its roof provided with a plurality of transversely extending water-cooled boxes or castings extending the entire width of the furnace and supported on the side walls thereof said boxes or castings extending into the roof from its outer surface and separated from each other by intervening portions of the roof, substantially as described.

7. A furnace of the class described having its roof provided with a plurality of transversely extending water-cooled boxes or castings extending the entire width of the furnace and supported on the side Walls thereof, adjacent boxes or castings being se arated from each other by intervening re actory portions of the roof, each of said boxes or castings being formed in a plurality of independent sections, substantially as described.

8. A furnace of the class described having its roof provided with a series of Watercooled boxes or castings removably set into the exterior portion of the roof Wall and su ported at their ends on the side walls of ti ie urnace, substantially as described.

9. A furnace of the class described havingits roof provided with a series of watercooled boxes or castings removably set into the exterior portion of the roof walland su e orted. at their ends on theside Walls of t e furnace, said boxes or castings bein each formed in independent sections, su stantially as described.

10. A furnace of the class described having gashand air uptakesygas and air ports and an arc fixed ortion, and another ortion which exten s over the gas u'pta e removable through the end wall of the furnace, substantially as described.

11. In a furnace of the class described having'gas and air uptakes, gas and air ports, and

an arch separating the gas and air ports, saidarch having a fixed portion. and another por tion which extends over the gas uptake re.- movable and provided with water-cooling means therein, substantially as described,

12. In a furnace of'the class described,-

having gas and air u takes, gas and air ports, and a refractoryarc separatinfgxthe gas and air ports, said arch having a ed portion,

and another portion which extends over the gas uptake removable and provided with cooling means forming a support for the refractory body of the arch, substantially as described. f

13. A furnace of the class described having gas and air uptakes, gas and air port's, and an arch separating said ports, that portion of the arch which extends over the gas uptake being removable through'the end Wall ofthe' separating said por'ts, said arch having a and the nose portion of the arch being nonremovable and also having water-cooling means, substantially as described.

14. A furnace of the class described having gas and air uptakes, gas and air ports, and an arch separating said gas and air ports, that portion of the arch which extends over the gas u take being removable through the main wa of the furnace and having watercooling means, and theinner or nose ortion of the arch being non-removable and V aving therein a lurality of transversely extending water-cooling boxes or-castings, substantially as described. V 15. A furnace of the class described having gas and air orts andfuptakes therefor, the outer Walls 0 the uptakes having therein water-cooled boxes or castings which are common to both the gas and air uptakes,

substantially as described.

16. A furnace of the class described liaving gas and air ports, and uptakes therefor;

versely back of the. inner Walls of the air uptake, substantially as described,

17. A furnace of the class described having air and gas ports, and uptakes therefor, the outer walls of the uptakes havin therein water-cooled boxes or castings w 'ch are common to both the gas and air ports, other water-cooled boxes or castings extending inwardly lon itudinally of the furnace between the gas an air ports, and other water-cooled water-cooling means therein, said water.- '1) my hand.

- LUTHER L. KNOX.

Witnesses:

H. M. CoRwIN,

Gno' H. P RMELEa.

e furnace be- 

